Bad:
1. It is way too loud. Even if you like it loud, this is too much.
2. Resonance, making it super loud at the wrong times. Driving cheap? Resonance at ~1500rpm. Driving at the freeway? Resonance at 3000rpm.
3. Until I made an extra fitting for the left pipe, my exhaust wasn't level. This is something that you easy could do by salvaging the fitting from your old exhaust pipe.

Good:
1. Price
2. Looks

Conclusion
If I knew about the resonance and extremely loud noise I would not have bought this product. I would have preferred the original system even with the open hole in my bumper.